Author Question: The mass extinction at the end of the Ordovician wiped out about half of the ____ population. ... (Read 23 times)

brutforce · **on:** Jul 13, 2018

The mass extinction at the end of the Ordovician wiped out about half of the ____ population.
A)dinosaur
B)vascular plant
C)non-vascular plant
D)brachiopod and bryozoan
E)stromatoporoid and rugose coral

Question 2

Compare and contrast valley and continental glaciers.

carolinefletcherr · **Reply #1 on:** Jul 13, 2018

Answer to Question 1

D

Answer to Question 2

Answers may include:
1. Both valley and continental glaciers move via plastic flow and basal slip. On average, valley glaciers tend to move faster.

2. Both are responsible for eroding the landscape and depositing new features. Terminal moraines, recessional moraines, lateral moraines, and medial moraines help scientists determine the extent of glaciation and the structure of the glacier. Both alpine and continental glaciers have outwash plains with braided streams and lakes. The erosional features are different. Valley glaciers form horns, cirques, artes, and u-shaped valleys.Continental glaciers form ice scoured plains. Valley glaciers carry sediments in all parts of their ice, while continental glaciers carry sediments in the lower part of their ice.

3. Continental glaciers are restricted to higher latitudes and are larger in size. Valley glaciers can occur at any latitude, even equatorial if the elevation is high, and are smaller.